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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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/ˈɑpʃən(ə)l/The price includes hotel and meals – entertainment is optional.
Add one cup of walnuts (optional).
The history class is optional, but English is compulsory.
Remote central locking comes as an optional extra.
This is the American English definition of optional. View British English definition of optional.
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a percussion instrument used by football fans which makes a rattling sound when shaken
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Open Dictionary
… the decision to treat the rights and duties of a company as being the same as the rights and duties of its shareholders
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